Climate waring as Siberia melts

Scientists warn about a depot of 70 billion tons of methane ready to be released into the atmosphere as the permafrost in Siberia melts due to global warming. Methane is 20 times as potent a greenhouse gas as carbon dioxide.

An international research partnership known as the Global Carbon Project earlier this year identified melting permafrost as a major source of feedbacks that could accelerate climate change.